A brief daily summary of what is important in information security. The podcast is published every weekday and designed to get you ready for the day with a brief, usually 5 minute long, summary of current network security related events. The content is late breaking, educational and based on listener input as well as on input received by the SANS Internet Stormcenter. You may submit questions and comments via our contact form at https://isc.sans.edu/contact.html .
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SANS Stormcast Thursday, August 14th, 2025: Equation Editor; Kerberos Patch; XZ-Utils Backdoor; ForitSIEM/FortiWeb patches
CVE-2017-11882 Will Never Die The (very) old equation editor vulnerability is still being exploited, as this recent sample analyzed by Xavier shows. The payload of the Excel file attempts to download and execute an infostealer to exfiltrate passwords via email. https://isc.sans.edu/diary/CVE-2017-11882%20Will%20Never%20Die/32196 Windows Kerberos Elevation of Privilege Vulnerability Yesterday, Microsoft released a patch for a vulnerability that had already been made public. This vulnerability refers to the privilege escalation taking advantage of a path traversal issue in Windows Kerberos affecting Exchange Server in hybrid mode. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53779 Persistent Risk: XZ Utils Backdoor Still Lurking in Docker Images Some old Debian Docker images containing the xz-utils backdoor are still available for download from Docker Hub via the official Debian account. https://www.binarly.io/blog/persistent-risk-xz-utils-backdoor-still-lurking-in-docker-images FortiSIEM / FortiWeb Vulnerablities Fortinet patched already exploited vulnerabilities in FortiWeb and FortiSIEM https://fortiguard.fortinet.com/psirt/FG-IR-25-152 https://fortiguard.fortinet.com/psirt/FG-IR-25-448
SANS Stormcast Wednesday, August 13th, 2025: Microsoft Patch Tuesday; libarchive vulnerability upgrade; Adobe Patches
Microsoft Patch Tuesday https://isc.sans.edu/diary/Microsoft%20August%202025%20Patch%20Tuesday/32192 https://cymulate.com/blog/zero-click-one-ntlm-microsoft-security-patch-bypass-cve-2025-50154/ libarchive Vulnerability A libarchive vulnerability patched in June was upgraded from a low CVSS score to a critical one. Libarchive is used by compression software across various operating systems, making this a difficult vulnerability to patch https://www.freebsd.org/security/advisories/FreeBSD-SA-25:07.libarchive.asc Adobe Patches Adobe released patches for 13 different products. https://helpx.adobe.com/security/Home.html
SANS Stormcast Tuesday, August 12th, 2025: Erlang OTP SSH Exploits (Palo Alto Networks); Winrar Exploits; Netscaler Exploits; OpenSSH Pushing PQ Crypto;
Erlang OTP SSH Exploits A recently patched and easily exploited vulnerability in Erlang/OTP SSH is being exploited. Palo Alto collected some of the details about this exploit activity that they observed. https://unit42.paloaltonetworks.com/erlang-otp-cve-2025-32433/ WinRAR Exploited WinRAR vulnerabilities are actively being exploited by a number of threat actors. The vulnerability allows for the creation of arbitrary files as the archive is extracted. https://thehackernews.com/2025/08/winrar-zero-day-under-active.html Citrix Netscaler Exploit Updates The Dutch Center for Cyber Security is updating its guidance on recent Citrix Netscaler attacks. Note that the attacks started before a patch became available, and attackers are actively hiding their tracks to make it more difficult to detect a compromise. https://www.ncsc.nl/actueel/nieuws/2025/07/22/casus-citrix-kwetsbaarheid https://www.bleepingcomputer.com/news/security/netherlands-citrix-netscaler-flaw-cve-2025-6543-exploited-to-breach-orgs/ OpenSSH Post Quantum Encryption Starting in version 10.1, OpenSSH will warn users if they are using quantum-unsafe algorithms https://www.openssh.com/pq.html
SANS Stormcast Monday, August 11th, 2025: Fake Tesla Preorders; Bad USB Cameras; Win-DoS Epidemic
Google Paid Ads for Fake Tesla Websites Someone is setting up fake Tesla lookalike websites that attempt to collect credit card data from unsuspecting users trying to preorder Tesla products. https://isc.sans.edu/diary/Google%20Paid%20Ads%20for%20Fake%20Tesla%20Websites/32186 Compromising USB Devices for Persistent Stealthy Access USB devices, like Linux-based web cams, can be compromised to emulate malicious USB devices like keyboards that inject malicious commands. https://eclypsium.com/blog/badcam-now-weaponizing-linux-webcams/ Win-DoS Epidemic: A crash course in abusing RPC for Win-DoS & Win-DDoS Internet-exposed DCs can be used in very powerful DoS attacks. https://defcon.org/html/defcon-33/dc-33-speakers.html#content_60389
SANS Stormcast Friday, August 8th, 2025:: ASN43350 Mass Scans; HTTP1.1 Must Die; Hyprid Exchange Vuln; Sonicwall Update; SANS.edu Research: OSS Security and Shifting Left
Mass Internet Scanning from ASN 43350 Our undergraduate intern Duncan Woosley wrote up aggressive scans from ASN 43350 https://isc.sans.edu/diary/Mass+Internet+Scanning+from+ASN+43350+Guest+Diary/32180/#comments HTTP/1.1 Desync Attacks Portswigger released details about new types of HTTP/1.1 desync attacks it uncovered. These attacks are particularly critical for organizations using middleboxes to translate from HTTP/2 to HTTP/1.1 https://portswigger.net/research/http1-must-die Microsoft Warns of Exchange Server Vulnerability An attacker with admin access to an Exchange Server in a hybrid configuration can use this vulnerability to gain full domain access. The issue is mitigated by an April hotfix, but was not noted in the release of the April Hotfix. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53786 Sonicwall Update Sonicwall no longer believes that a new vulnerability was used in recent compromises https://www.sonicwall.com/support/notices/gen-7-and-newer-sonicwall-firewalls-sslvpn-recent-threat-activity/250804095336430 SANS.edu Research: Wellington Rampazo, Shift Left the Awareness and Detection of Developers Using Vulnerable Open-Source Software Components https://www.sans.edu/cyber-research/shift-left-awareness-detection-developers-using-vulnerable-open-source-software-components/
SANS Stormcast Thursday, August 7th, 2025: Sextortion Update; Adobe and Trend Micro release emergency patches
Do Sextortion Scams Still Work in 2025? Jan looked at recent sextortion emails to check if any of the crypto addresses in these emails received deposits. Sadly, some did, so these scams still work. https://isc.sans.edu/diary/Do%20sextortion%20scams%20still%20work%20in%202025%3F/32178 Akira Ransomware Group s use of Drivers Guidepoint Security observed the Akira ransomware group using specific legitimate drivers for privilege escalation https://www.guidepointsecurity.com/blog/gritrep-akira-sonicwall/ Adobe Patches Critical Experience Manager Vulnerability Adobe released emergency patches for a vulnerability in Adobe Experience Manager after a PoC exploit was made public. https://slcyber.io/assetnote-security-research-center/struts-devmode-in-2025-critical-pre-auth-vulnerabilities-in-adobe-experience-manager-forms/ https://helpx.adobe.com/security/products/aem-forms/apsb25-82.html Trend Micro Apex One Vulnerability Trend Micro released an emergency patch for an actively exploited pre-authentication remote code execution vulnerability in the Apex One management console. https://success.trendmicro.com/en-US/solution/KA-0020652
SANS Stormcast Wednesday, August 6th, 2025: Machinekeys and VIEWSTATEs; Perplexity Unethical Learning; SonicWall Updates
Stealing Machinekeys for fun and profit (or riding the SharePoint wave) Bojan explains in detail how .NET uses Machine Keys to protect the VIEWSTATE, and how to abuse the VIEWSTATE for code execution if the Machine Keys are lost. https://isc.sans.edu/diary/Stealing%20Machine%20Keys%20for%20fun%20and%20profit%20%28or%20riding%20the%20SharePoint%20wave%29/32174 Perplexity is using stealth, undeclared crawlers to evade website no-crawl directives Perplexity will change its User Agent, or use different originating IP addresses, if it detects being blocked from scanning websites https://blog.cloudflare.com/perplexity-is-using-stealth-undeclared-crawlers-to-evade-website-no-crawl-directives/ Gen 7 SonicWall Firewalls SSLVPN Recent Threat Activity Over the past 72 hours, there has been a notable increase in both internally and externally reported cyber incidents involving Gen 7 SonicWall firewalls where SSLVPN is enabled. https://www.sonicwall.com/support/notices/gen-7-sonicwall-firewalls-sslvpn-recent-threat-activity/250804095336430
SANS Stormcast Tuesday, August 05, 2025: Daily Trends Report; NVidia Triton RCE; Cursor AI Misconfiguration
Daily Trends Report A new trends report will bring you daily data highlights via e-mail. https://isc.sans.edu/diary/New%20Feature%3A%20Daily%20Trends%20Report/32170 NVidia Triton RCE Wiz found an interesting information leakage vulnerability in NVidia s Triton servers that can be leveraged to remote code execution. https://www.wiz.io/blog/nvidia-triton-cve-2025-23319-vuln-chain-to-ai-server Cursor AI MCP Vulnerability An attacker could abuse negligent Cursor MCP configurations to implement backdoors into developer machines. https://www.aim.security/lp/aim-labs-curxecute-blogpost
SANS Stormcast Monday, August 4th, 2025: Legacy Protocols; Sonicwall SSL VPN Possible 0-Day;
Scans for pop3user with guessable password A particular IP assigned to a network that calls itself Unmanaged has been scanning telnet/ssh for a user called pop3user with passwords pop3user or 123456 . I assume they are looking for legacy systems that either currently run pop3 or ran pop3 in the past, and left the user enabled. https://isc.sans.edu/diary/Legacy%20May%20Kill/32166 Possible Sonicwall SSL VPN 0-Day Arcticwolf observed compromised Sonicwall SSL VPN devices used by the Akira group to install ransomware. These devices were fully patched, and credentials were recently rotated. https://arcticwolf.com/resources/blog/arctic-wolf-observes-july-2025-uptick-in-akira-ransomware-activity-targeting-sonicwall-ssl-vpn/ PAM Based Linux Backdoor For over a year, attackers have used a PAM-based Linux backdoor that so far has gotten little attention from anti-malware vendors. PAM-based backdoors can be stealthy, and this one in particular includes various anti-forensics tricks. https://www.nextron-systems.com/2025/08/01/plague-a-newly-discovered-pam-based-backdoor-for-linux/
SANS Stormcast Friday, August 1st, 2025: Scattered Spider Domains; Excel Blocking Dangerous Links; CISA Releasing Thorium Platform
Scattered Spider Related Domain Names A quick demo of our domain feeds and how they can be used to find Scattered Spider related domains https://isc.sans.edu/diary/Scattered+Spider+Related+Domain+Names/32162 Excel External Workbook Links to Blocked File Types Will Be Disabled by Default Excel will discontinue allowing links to dangerous file types starting as early as October. https://support.microsoft.com/en-us/topic/external-workbook-links-to-blocked-file-types-will-be-disabled-by-default-6dd12903-0592-463d-9e68-0741cf62ee58 CISA Releases Thorium CISA announced that it released its malware analysis platform, Thorium, as open-source software. https://www.cisa.gov/news-events/alerts/2025/07/31/thorium-platform-public-availability
SANS Stormcast Thursday July 31st, 2025: Firebase Security; WebKit Vuln Exploited; Scattered Spider Update
Securing Firebase: Lessons Re-Learned from the Tea Breach Inspried by the breach of the Tea app, Brendon Evans recorded a video to inform of Firebase security issues https://isc.sans.edu/diary/Securing%20Firebase%3A%20Lessons%20Re-Learned%20from%20the%20Tea%20Breach/32158 WebKit Vulnerability Exploited before Apple Patch A WebKit vulnerablity patched by Apple yesterday has already been exploited in Google Chrome. Google noted the exploit with its patch for the same vulnerability in Chrome. https://nvd.nist.gov/vuln/detail/CVE-2025-6558 Scattered Spider Update CISA released an update for its report on Scattered Spider, noting that the group also calls helpdesks impersonating users, not just the other way around. https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-320a
SANS Stormcast Wednesday July 30th, 2025: Apple Updates; Python Triage; Papercut Vuln Exploited
Apple Updates Everything: July 2025 Edition Apple released updates for all of its operating systems patching 89 different vulnerabilities. Many vulnerabilities apply to multiple operating systems. https://isc.sans.edu/diary/Apple%20Updates%20Everything%3A%20July%202025/32154 Python Triage A quick python script by Xavier to efficiently search through files, even compressed once, for indicators of compromise. https://isc.sans.edu/diary/Triage+is+Key+Python+to+the+Rescue/32152/ PaperCut Attacks CISA added a 2024 Papercut vulnerability to the known exploited vulnerability list. https://www.cisa.gov/news-events/alerts/2025/07/28/cisa-adds-three-known-exploited-vulnerabilities-catalog
SANS Stormcast Tuesday, July 29th, 2025:Parasitic Exploits; Cisco ISE Exploit; MyASUS Vuln
Parasitic SharePoint Exploits We are seeing attacks against SharePoint itself and attempts to exploit backdoors left behind by attackers. https://isc.sans.edu/diary/Parasitic%20Sharepoint%20Exploits/32148 Cisco ISE Vulnerability Exploited A recently patched vulnerability in Cisco ISE is now being exploited. The Zero Day Initiative has released a blog detailing the exploit chain to obtain code execution as an unauthenticated user. https://www.zerodayinitiative.com/blog/2025/7/24/cve-2025-20281-cisco-ise-api-unauthenticated-remote-code-execution-vulnerability MyAsus Vulnerablity The MyAsus tool does not store its access tokens correctly, potentially providing an attacker with access to sensitive functions https://www.asus.com/content/security-advisory/
SANS Stormcast Monday, July 28th, 2025: Linux Namespaces; UI Automation Abuse; Autoswagger
Linux Namespaces Linux namespaces can be used to control networking features on a process-by-process basis. This is useful when trying to present a different network environment to a process being analysed. https://isc.sans.edu/diary/Sinkholing%20Suspicious%20Scripts%20or%20Executables%20on%20Linux/32144 Coyote in the Wild: First-Ever Malware That Abuses UI Automation Akamai identified malware that takes advantage of Microsoft s UI Automation Framework to programatically interact with the user s system and steal credentials. https://www.akamai.com/blog/security-research/active-exploitation-coyote-malware-first-ui-automation-abuse-in-the-wild Testing REST APIs with Autoswagger The tool Autoswagger can be used to automate the testing of REST APIs following the OpenAPI/Swagger standard. https://github.com/intruder-io/autoswagger/
SANS Stormcast Friday, July 25th, 2025: ficheck.py; Mital and SonicWall Patches
New File Integrity Tool: ficheck.py Jim created a new tool, ficheck.py, that can be used to verify file integrity. It is a drop-in replacement for an older tool, fcheck, which was written in Perl and no longer functions well on modern Linux distributions. https://isc.sans.edu/diary/New%20Tool%3A%20ficheck.py/32136 Mitel Vulnerability Mitel released a patch for a vulnerability in its MX-ONE product. The authentication bypass could provide an attacker with user or even admin privileges. https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-misa-2025-0009 SonicWall SMA 100 Vulnerability SonicWall fixed an arbitrary file upload issue in its SMA 100 series firewalls. But exploitation will require credentials. https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0014